How do iget legal aid for free?

Last night I got arrested for ult for BBQ sauce on this jerk bouncer and ran. Then I was walking with my boyfriend not even on the bars property and him and another bouncer grabbed me and tried puulling me towards the bar but I dropped to the ground so they couldn't and he punched me in the face and my knees are all scrapped up from him dragging me and they got the cops and they watched the video survallience and I got arrested and taken to jail for 12 hours and have court this Friday so I need a free lawyer but I'm unsure how to get one in such short time so can anyone give me advice and the cops didn't even care I was bleeding they were so concerned about a bit of BBQ sauce on his shirt... Isn't that wrong I dno what kinda guys treat girls like that but I'm shocked please help